Burner



Sept- 9, 1941 H. N. CHRISTMAS 2,255,349

BURNER Filed Jan. 21, 1939 w@Illlllllllllmnlnlz""2 54 INVENTR Henr' Nunn Chrxsmas RN EY Patented sept. 9, 1941 UNITED'` STATES 4lni'raN'r OFFICE BURNER..

Henry Nunn Christmas, Mount Vernon, N. Y., assignor to Robert P. SniffemNew York, N. Y.

Application January '21, 193s, serial No. 252,055

f 2 claims. (ci. 15s-'116) radiating broiling elem'ents II of ceramic or other heat-resistingV material, the ceramic ele ments being formed in sections and defining a centrally located orifice I2 through which ex- 4tends the burners designated generally bythe reference numeral |13. The burners I3 are provided with suitable gaseous fuel from a suitable source of supply through conduits I4 and elbows i I5, such conduitsand elbows being supported in even broiling of the foodproduct. My improved burners are adapted for use in practically every commercial form of broiling apparatus, and are adapted to be connected in thebroiling apparatus with a minimum of effort and in such manner as to be free from strain.

An important feature of my invention is a construction whereby the temperature of the material of the burner is kept at a. relatively low, point, in contradistinction to previous typesfof burners wherein in many instances the material of the bur-ner itself is brought to an exceedingly high temperature during operation, with the resultant effect of materially shortening the life thereof.' a

A feature of my invention is an improved gaseous fuel burner for'broilers.

A feature of my invention isa gaseous fuel burner having means for permitting circulation of cooling air about the elements'thereof.

Other features of the invention will be apparent as the description of the invention progresses.

In the accompanying drawing,

operative position on the framework I0 by brackets I6 and I'I.

' There` is shown in Figures 2 to '5 inclusive an embodiment of my inventionwl'lereinl the base I8 of the burner is substantially rectangular in form thereby conforming generally to the shape of the opening I2 defined by the ceramic elements II. The base I8, at practically any point, is substantially cylindrical in cross section,- is in the form of a hollow square, and has formed l therein a tubular passage I9.

The vertical sides of the substantially rectangular base I8 are drilled to form a plurality of perforations 20 and through which from the passage I9 the gaseous fuel may flow in a horizontal direction or in a direction substantially parallel to thel cooperative heat radiating-face of the ceramic elements II. of the substantially rectangular base I8 is provided-on its edge and about the periphery thereof with a pluralityv of spaced upwardly extending t projections 2l which bear against the lower pe- Fig. 1 is a side elevation partly in section ofv a broiler; I

Fig. 2 is a bottom plan view of my improved gaseous fuel burnerpartly in sectionimposition on the ceramic element of the broiler;

Fig. 3 is a sectional side elevation through my improved gaseous fuel burnertaken on the line 3-3 of Figure 2;

Figure 4 is a sectional elevation of my improved burner taken on the line 4--4 of Figure 2;

Figure 5 is a top plan view of my improved gaseous fuel burner illustrated in Figures 1 to 4, and

Figure Gis a sectional elevation of a modified rembodiment of my invention, the section being taken on a diagonal similar to the section shown in Figure 4.

Referring to the drawing, I0 designates the v framework of a broiler having positioned therein a gaseous tight joint. Formed at diametrically ripheral edge of the passage or opening I2 in the ceramic element II. As shown. the substantially .rectangular base I8 is in the form of ahollow square and therefore it will be apparent that the material of the base Isis entirely surrounded by and exposed to air'which may flow through the passage or opening I2' ln the ceramic element Il. Such flow of air is facilitated by the -upwardly extending projections 2| which permit the air to flow over the surface of the base I8'in the spaces between such projections 2|.

Formed integral with the base I8 and extending upwardly therefrom is a rood-shaped hollow member 22, the lower ends of the arms 23 of which join the base member I8 at the corners ignated by the reference numeral 24, and at their upper ,end communicate with a chamber 25 formed in the upper end 26 of the rood-shaped member 22. Themember 26, at the upper end thereof, is provided with a passage 21 communieating with the chamber 25, and which cooperates with the lower end of the elbows I5 to form Also the top face.

The passages in the arms 23 are desopposite points on the member 26 are projec tions 28 drilled and tapped as indicated by theV reference numeral 23 to receive screws 30. The screws 30 pass through an integral flange 3I on the-elbows I5, or through a separate member (not shown), the object being to draw the roodshaped member 22 into gaseous with the elbows I5, and to bring the upper edges of the profections 2I into engagement with the peripheral edge of the passages I2 in the ceramic members II.

In Figure 6 is a shownI a modified embodiment of my invention and wherein the substantially rectangular base is designated by the reference numeral 32, the passage therein extending around the periphery thereof being designated by the reference numeral 33, and with the perforations about the periphery of the member 32 being designated as 3|. In this modification also the upper edge ofthe base 32 is provided with the spaced upwardly extending projections 35 which have the same function as the upwardly extending projections 2| in the modification above described. Extending inwardly from the corners of the base 32, and lying inthe same piane as -such member, are tubular arms 3B formed integral with a central upwardly extending tubular portion 31, the interior bore 38 of which engages with the lower end of theelbows I5. In this modification, also, the tubular upwardly extending member 31 has the diametrically disposed projections 39 drilled and tapped as at 40 to receive. the screws 30. y

The ceramic elements II are provided on their under face with downwardly extending conical projections 4I and the body portion of such ceramic elements I I are provided 'with a plurality of perforations l2 through which air may pass. The downwardly extending conical projections l I are heated to incandescence and radiate a maximum volume of heat for broiling purposes.- Situated as it is, the burner I3 is exposed to intense heat, but by the provision of the hollow square base I3 or 32 and spaced from the ceramic elements I'I by the upwardly extending projections 2l or 35, there is a constantlilow of air through the passage I2 in the ceramic elements II completely around the rectangular bases I3 and/or '32 and this ow of air materially assists in maintaining the burner I3 relatively cool. As an example, the ordinary temperature ofthe burner tight association I3 in the usual prior devices 'of this type is approximately 1,100whereas with my improved device theoperating temperature of the burner I3 is approximately 360.

y Whereas I have, described my invention by reference to sp'ecic forms thereof, it will be understood that many changes and modifications may be made without departing from the spirit of the invention.

I claim: v

1. An improved broiler comprising, in combination, a framework, a. ceramic broiler element mounted thereon and provided with a plurality of projecting heat radiating points and with a centrally arranged orifice, a gaseous fuel burner secured to the framework and extending through the orifice, said burner having a hollow tubular substantially rectangular base in the form of a hollow square, a plurality of perforations on the peripheral edge of the base to direct gaseous fluid in a direction parallel to the ends of the plurality of heat radiating points, and a plurality of projections arranged in spaced relation on the base for engaging with the ceramic broiler element r labout the perimeter of the said orifice, whereby the base is maintained out of contact with the broiler'element and free circulation of air about the base is permitted.-

2. In an improved gaseous fuel burner in coml bination with a ceramic designed to radiate heat,

. a base tubular in cross-section and bounding an open area and having a plurality of perforatlons extending through the exterior sides thereof for affording flow of gaseous fluid from the base in a plane parallel to a face of the ceramic, a hollow member formed integral with the base on one face thereof and having an upwardly extending portion, meanson -said upwardly extending portion for connecting the burner to a source of -fuel supply, and upwardly extending members spaced about the upper peripheral edge of the base for 'positioning the ceramic with regard to the base, whereby the upper surface of the base is spaced apart from the ceramic to position the plurality ofperforations in the exterior sides of the base below the ceramic and the spaces between adjacentupwardly extending members are unobstructed and afford flow of air over and across the top surface of the base.

'HENRY NUNN CHRISTMAS. 

